INDEX 
sary conditions, 89; oxygen re- 
quirement, 92; processes, 93-98; 
temperature requirement, 89. 
Germinators, 99, 99*, 100*. 
Germ-plasm, 532. 
Giant Evening Primrose, 530, 530*. 
Gill Fungi, 385. 
Gleba, 390. 
Gleocapsa, 298. 
Gliadins, 281. 
Globulins, 281. 
Glomerella rufomaculans, 379, 379*. 
Glucose, 277. 
Glucosides, 281. 
Glumes, 17, 18*; empty or outer, 18, 
18*; flowering, 18. 
Glutelins, 281. 
Glutenin, 281. 
Grafting, 225; described, 227, 232*. 
Gramineae, 495. 
Grape vine, 176, 176*. 
Grape Downy Mildew, 355, 355*, 356*, 
357*. 
Grape sugar, 277. 
Grass, flowers, 17-23, 17*, 18*, 19*, 
20*, 21*, 22*; family, 495; seed- 
lings, 102, 102*, 103*, 104*. 
Grass type of seeds, 61-67. 
Green Algae, 301-318; confervoid, 
310-314; conjugating, 314-316; 
in relation to Lichens, 380; tubu- 
lar, 316-318; unicellular motile, 
302-307; unicellular non-motile, 
307-310. 
Green Foxtail, seed, 76*. 
Green Molds, 364; described, 375, 
375*. 
Grizzly Giant, 174*. 
Growth in roots, factors influencing 
the direction, 150, 151*. 
Growth of Stems, 213-221; char- 
acter and rate, 214; factors in- 
fluencing, 217-221; grand period, 
216; phases, 213; primary and 
secondary, 214; regions, 213, 
214*. 
Guard cells, 247, 246*, 247*. 
Gulfweeds, 319; described, 323. 
575 
Gymnosperms, 67, 289; described, 
445-458; life cycle, 457*; seed 
and seedling, 67, 67*. 
Gymnosporangium, 401, 400*, 401%, 
402*, 403*. 
Halberd-shaped leaves, 479*. 
Hard seeds, 69. 
Hardwood cuttings, 227, 230*. 
Harmogonia, 299, 299*. 
Haustoria, 352, 356*. 
Head, 30, 29*, 32*. 
Heart Rot, White and Red, 389. 
Heart wood, 202, 200*. 
Heath family, 489. 
Heathers, 490. 
Heliotropism, 152. 
Helvellales, 364. 
Hemi-celluloses, 278. 
Hemlock, 451. 
Hepaticae, 405. 
Herbaceous stems, 
192-197. 
Herbarium Mold, 375. 
Heredity, 535-556; experimental 
study, 537-556; importance of 
its study, 537; nature, 535; physi- 
cal basis, 535. 
Heterocysts, 299, 299*. 
Heterogametes, 302. 
Heterogamous sexuality, 304. 
Heterospory, 442. 
Heterozygous, 544. 
Hibiscus Trionum, 487. 
Hickory, pistillate flower, 81*; species 
and economic importance, 475; 
tap-root, 139, 139*. 
Hilum, of seed, 57, 57*; of starch 
grain, 256*. 
Histology, 2. 
Holdfasts, 135. 
Homospory, 442. 
Homozygous, 544. 
Hooke, Robert, 113. 
Horny endosperm, 64, 63*, 64*. 
Horse Nettle, 492, 491*. 
Horsetails, 426; described, 435. 
Horticulture, 1. 
171; structure, 
